Machine-drill.



C. E. COX.

MACHINE DRILL.

APPLICATION FILED MAYH. 19u.

1 ,270, 1 2 1 Patented June 18, 1918.

3 SHEETS-'SHEET l.

C. E. COX. ,M ACHINE'DRILL.

APPLICATION msn mnu. :911.

1,270,121. A `P..t@..ted;r.me18,1918.

3 SHEETS-SHEET 2.

NVENTH arles l Caz C. E. COX. MACHINE Dam.

APPLICATION FILED MAY I7 19H.

Patented June 18, 1918.

3 SHEETS-SHEET 3.

A TTUH/VEYS ED; STATES PATENT ernten.

GEAIBILES` EUGENE COX, OF VENICE, CALIFORNIA, ASSIGNOR F ONE-FOURTH T0 BUENHAM F. CBOSSMAN, 0F LOS ANGELES, CALIFORNIA.

MacJams-nam.

To all 'whom it may concern:

Be it known that I, CHARLES E. Cox, a citizen of the United States, and a resident of Venice, in the county of Los Angelesl and State of California, have invented a new and Improved Machine-Drill, of which the following is a full, clear, andv exact demultiplicity of holes may be bored or a plurality of like operations performed in succession without stopping the machine, and

the successive operatlons be performed with convenience and despatch.

An important object of the invention also is to provide automatic means associated with a chuck or equivalent tool holder and a drive spindle therefor, so that an axial movement of the spindle relatively to the chuck will cause the latter to be latched to the spindle and whereby .a reversev axial movement of the spindle will disestablish the driving connection with the "chuck and cause the latter to be suspended in positionl until automatically released andI again attached to the s indle.

A further o ject of the invention is to provide a revoluble tool carrier equipped.``

with an annular series of chucks whereby the turning of said carrier will serve to locate a articular chuck in line with vthe drive spindle, there being means on'the tool carrier and arranged in connection with the individual chucks toeiect the automatic attachment and detachment of an alined chuck. 1

The invention furthermore has for an ob- 'ect :provided with chucks or tool holdersv fora large number of tools and revolubl mountedon a drill head, whereby to rea ily posil tion any one of the chucks for engagement with the drive spindle, the drill hea being 1 adapted to be readily raised or lowered to Sp ecication of Letters Iatent. Appuaucn'mea my 17, 1917. serial no. 169,222.

p scription proceeds.

- may l to the drill shown in My invention may be carrled'out in van- 'to provide a cylindrical tool carrier' Patented J une 18, 1918.

give the tool carrier the desired elevation for a particular piece of work Another object-of the invention is to provide a machine of the indicated character of simple construction insuring strength and durability with the minimum liability of the parts becoming disarranged.

The nature of the invention and its advanta es will more clearly appear as the de- Reference is to be had -to the accompanylng drawings forming a part of this specification in which similar reference characters indicate corresponding parts in all the views, it being understood that the drawf ings are merel illustrative of practical-exam les of the mvention. o

igure 1 is a side elevation of a machine embodying my invention;

Fig. 2 is a transverseV vertical section.-

thereof;

' Fig. 3 is an enlarged transverse vertical section given to show the means for automatically effecting the attachment or detachment of a clutch, the chuck being shown in the unlatched position;

Fig. 4et' is a view similar to Fig. .3, show- -ing the chuck in clutched and latched env ga ement with the spindle;

ig.- 5 is a side elevation partly in section showing the ada tation of my invention to an ordinary blac mith7s hand drill;

6 is a side elevation of a shaft that `e employedy in applying my invention ous forms, there being shown in Fig.` 1

a frame designated .generallyvby the nu-I meral 10 having a tubular post 11. On the o post 11 or other vertical guide means -provided in the machine', is vertically)7 movable a drill head designated generally y the numeral 12 which is given guided linear movement by engagement with a suitable frame member, the said head as seen in Figs. 1

and 2 having a member 13 formed wlth'a vertical, groove receiving a vertical guide rib 14 on the frame head. The drill head 12 preferably is counter-balanced in ractice, for which purpose a weight 15 is ung over a sheave 17 to theoutside of the post and made fast :at its' opposite end as at 16 to said ldrill I head.

within the post 11 on a cord 16 running 10E v ,Y thespindle and chuckb a a ment of the spindle.

On the drill head 12 I revolubly mount a tool carrier 18, the drill head having a de-. pending sleeve 12 embracing the post f11` -and the tool carrier 18 having a depending that the said elements 19 and 20 constitute' a race for ball bearings or roller bearin 1 21. -The collar 19 in-the illustrated examp e is shown as secured by a sety screw 22 simply as one means for-'the purpose. To raise and lower the drill head 12 and thereby adjustthe height of the tool `carrier 18, I may employ a pinion 23 on thel shaft of which is a handle 24 for turning the same, a locking ipawl 25 being provided'. The pinion 23 es with a'vertical' xedA rack 26 on the post 11 so that the turning of the pinion by the'handle 24 when the pawl 25 is released f causes a vertical movement lof the drill head, the pawlserving to lock the pinion 225 against turning to hold the drill head at a gwen elevation.

In order to" turn the tool carrier 18 on the drill head, a pinion 27 is in mesh with an annular concentric gear or rack 28 on the 3io tool carrier, the shaft 29 of said pinion l27 v turning in suitable bearings on the drill 'head 12 and having a handwheel 30 or the like for turning said shaft to thereby turn the tool carrier through any desired'angle.

' 85 To hold the tool carrier 18 against turning,

'a second annular rack or gear 32 is formed thereon or secured thereto and ada ted toy be engaged by' a dog 31, on the s aft of which a handle 31 is provided for rocking so it into or out of engagement with the said rack 32.

- rIhe'toolcarrier 18 is equipped with an annular series of chucks or tool holders 33 adapted to hold individual drills 34 of varysizes or other tools for performing di erent operations as will bereadily understood. The chucks 33 are adapted to turn and be moved axially in cylindrical bores 35 formed by sleeves or individual cylinders The. tool holders `33 correspond in number with the teeth of the annular rack 32 whereby the pawl 31 may be caused to lockv the. tool carrier 18 with an given tool holder v ertically alining wit the Ydrill spindle or drive'spindle 36 which is adapted to be driven and fed by the usual means, common to machine drills generally. On the y s indle 36 and on each chuck 33 are mating c utch elements 37 38, respectively, or equivalent coengaging drive elements. 1n connection, Vwith the chucks and the spindle, I provide means whereby to effect automatic clutched. and latched engagement between ongitudinal move- "-.best seen in Figs. 3

series.

and 4 latches 39 are used forthe purpose, disposed at opposite sides of each chuck 33,-r and pivoted thereon at the lower ends as at 40 to swing laterally. Each latch 39 is under the pressure of a suitable spring 41 here 7 0 i '1 of the sleeves 35a in which position ,the 80 latches, by engagement with the upper end Aof said sleeve, hold the chuck suspended.

The arrangement is such that an axial movement of. the spindle 36 to bring the clutch velements 37, 38 into engagement and move 85 I the chuck 33 longitudinally in the bore 35, thereby causes the engagement between the latches 39 and the upper -end of the sleeve j 358. to swing the said latches 39 laterally inward parallel or substantially so with the chuck and engage the upper .lends of the latches in an annular groove 36a formed on o v the spindle 36. y Upon the spindle 36 being raised, the engagement of thelatchesinthe groove 36a thereon will cause the chuck 33 95 to be raised until the latches again 'clear the upper end of the sleeve and permit the springs 41 to swing the latches outward and release the chuck from the spindle. It will be 4clear that with the described construction any drill or other tool` can be quickly brought into position ,beneath lthe spindle so that by the simple lowering of the spindle vit elfects the clutched and latched engagement with the chuck and the raising of the spindle effects the automatic release and the v suspending of the released chuck. The tool o .carrier 18 is cylindrical in practice and the chucks or tool holders thereon are in annular The reason is this construction permits the maximum number of tools being assembled in a given space and movable in a path for the individual tools to be optionally alined with the drive spindle.

It will be readily understood that the cylindrical tool carrier and chucks maybe embodied in-other machine drills or the like, one example being given in' Fig. 5, in which the cylindrical tool carrier designated 18" is applied to a iblacksmiths hand drill' of known form, the only material change being that if the position of the shaft 44 does not accord .with the position of the drill spindle 36?, the shaft 44b may be substituted, having one end 44a offset, the other end being straight to permit the lacing and removal of the tool carrier. he turning of the shaft more or less will cause the chucks to travel-in a path for alining with the drill spindle'which in this` example is equipped 180 annular groove 36 corresponding with the latch groove 36". The shaft 44 or 44b turns in upper and lower bearings having set screws 46. If necessary to properly posi-- tion the said bearings, a liner or block 44 is employed corresponding in thickness with the degree of adjustment of vthe shaft 44". A set collar 44d on the shaft beneath the tool carrier 18u serves to support the latter.

The illustrated means for driving and feeding the spindle 36 is of known form, there being a handwheel 48, the shaft of which turns in a hanger bearing 49 on the drill head `12 and is provided with a bevel wheel '50 acting through the known form of drive connections as illustrated, to manually actuate the feed worm 51 for raising or lowering the spindle, there bein also the usual power driven shaft 52 geare with the shaft of the worm 51. Itis to be understood that the drive and feed meansl form no part of the present invention as any standard means for the purpose may be employed.

I wish to state in conclusion that although the illustrated examples constitute practical embodiments of my invention, I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described my invention, 1 claim as new, and desire to secure by Letters Patent:

L The combination of a tool chuck, a spindle adapted for driving vengagement with the chuck, and holding means to re tain the chuck in driving engagement with the spindle, said holding means being carried by the chuck and disengageable from the spindle to release the chuck therefromV and adapted to sustain the released chuck in position to be again engaged with the spindle.

2. The combination of a chuck, means in which said chuck may turn, a drive spindle for the chuck, andv holding means movable to positions to hold the chuck in driving enement with the spindle or to be supported y the first means and thereby sustam-the chuckI in position for engagement with the spindle. v l

3. The combination of a chuck having clutch elements, relatively fixed frame, .a drive spindle having mating clutch elements and latch means mounted on the chuck an swingable into engagement with the spindle to hold the chuck in clutch with the spindle or to an outer position disengaged from the spindle and into en agement with said frame to support the c uck.

4. The combination of a chuck, means having a bore in which the chuc may turn or slide, a drive spindle mova le axially relatively to the chuck and to the*l said bore,

and movable means, adapted in `,one position thereof to hold the chuck in driving connection with the spindle, and adapted in another position to support the chuck in said bore,said movable lmeans being controlled by the axial movement of the spindle to disengage the chuck and spindle or to hold Athe same in driving connection.

5. The combination of a chuck, a drive spindle therefor, said chuck and spindle having mating clutch elements, means in whichthe chuck is revoluble and slidable, and holding elements pivoted on the chuck to turn and to slide therewith, said spindle havin means to permit engagement of the said e ements with the spindle to hold the chuck clutched, and said holding elements when the chuck is in position or release being swingable laterally out of engagement with the spindle and into supporting engagement with the first mentioned means.

6. The combination of a chuck, means having a bore in which the chuck is adapted to turn, a spindle adapted to have drivin en agement with the chuck, said chuck an s mdle being movable longitudinally relatlvely to the first means, holding elements pivoted on the chuck at the rear end and movable therewith to a position at the rear of the said bore or within the same, and spring means acting` on said elements and arranged to swing the same laterall outward into engagement with the fi mentioned means, at the rear end of the bore spindle.

CHARLES EUGENE COX. 

